The Sagrada Família is a large, unfinished basilica in Barcelona, Spain. Designed by architect Antoni Gaudí, it is famous for its striking, intricate facades and towering spires that resemble a forest canopy. Construction began in 1882, and although it remains incomplete, the basilica is a UNESCO World Heritage site and attracts millions of visitors each year. Gaudí devoted the last years of his life to its creation, and it's an outstanding example of modernist architecture.